Comb tooth type bridge expansion joint

Abstract

The utility model discloses a comb tooth type bridge expansion joint, relates to the technical field of bridge expansion joints, and aims to solve the problems that a waterproof layer of an existing comb tooth type bridge expansion joint is usually arranged at the bottom of an expansion tooth comb, water on a bridge can flow into tooth seams in rainy and snowy weather, the comb teeth are eroded, and some impurities such as grit can fall into the tooth comb seams, so that the bridge expansion joint cannot be damaged. At present, a waterproof layer is arranged at the top of an expansion joint to shield and protect the expansion joint, so that the expansion and contraction of a bridge are influenced, and the end part of the expansion joint possibly tilts upwards when the expansion joint is pressed back and forth by vehicles, so that the expansion joint is prevented from being damaged. Rainwater, snow water and other liquid pollutants can be directly prevented from entering the expansion joint from the upper portion, the probability of rusting of the comb plate can be greatly reduced, normal work of the expansion joint is ensured, and impurities such as grit can be prevented from being clamped into the expansion joint and are prevented from affecting normal sliding expansion of the expansion joint.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge expansion joint technical field, concretely is a kind of comb tooth type bridge expansion joint. BACKGROUND

[0002] Bridge material (mainly concrete and steel) can expand or shrink with the rise and fall of temperature, if there is no expansion joint to adapt to this length change, great temperature stress will be generated in the bridge. When the temperature rises, the bridge lengthens and is restricted, which generates compressive stress in the bridge; when the temperature drops, the bridge shrinks and is hindered, which generates tensile stress. These stresses can cause cracks in the bridge structure, and even destroy the bridge structure in severe cases. The expansion joint can provide space for the bridge to freely expand and contract when the temperature changes, thereby avoiding the accumulation of temperature stress.

[0003] In Chinese patent CN216275204U, a comb tooth type bridge expansion joint device includes a fixed comb tooth plate and a cross-joint comb tooth plate that cooperate with each other. The fixed comb tooth plate is installed at the first beam end, and the cross-joint comb tooth plate is installed at the second beam end. The second beam end is provided with a support, which is arranged below the cross-joint comb tooth plate. A gap is left between the support and the cross-joint comb tooth plate. A rotating shaft is arranged between the root of the cross-joint comb tooth plate and the support along the transverse direction of the bridge, so that the cross-joint comb tooth plate can rotate vertically relative to the support. The advantages of the utility model lie in that a gap is left between the support and the cross-joint comb tooth plate of the comb tooth type bridge expansion joint device, and a rotating shaft is arranged between the root of the cross-joint comb tooth plate and the support along the transverse direction of the bridge. Therefore, the vertical angular displacement can be adapted by the rotation between the rotating shaft and the support. In addition, the longitudinal expansion displacement can also be adapted by the cross expansion between the fixed comb tooth plate and the cross-joint comb tooth plate.

[0004] The existing comb tooth type bridge expansion joint usually has a waterproof layer arranged at the bottom of the expansion tooth comb. In rainy and snowy weather, water on the bridge can flow into the tooth gap and accumulate in the tooth gap, which can erode the comb tooth and affect its service life. In addition, some impurities such as sand and gravel can also fall into the tooth comb gap, which can affect the sliding expansion of the tooth comb, and thus can affect the stretching or contraction of the bridge. In addition, after a long period of use, the end of the moving tooth comb can be raised upward due to the pressure of the vehicles, which can affect the flatness of the bridge.

[0005] In view of the above problems, a comb tooth type bridge expansion joint is proposed. UTILITY MODEL CONTENTS

[0006] The utility model aims to provide a comb tooth type bridge expansion joint, which solves the problem of rainwater accumulation in the tooth gap, which can erode the expansion joint, and the problem of impurities such as sand and gravel falling into the tooth gap, which can affect the expansion performance of the expansion joint and the end of the tooth comb can be raised upward, which can affect the flatness.

[0007] In order to achieve the above object, the utility model provides the following technical scheme: a tooth comb type bridge expansion joint, including tooth comb type expansion component, tooth comb type expansion component includes first mounting plate, the side of first mounting plate is integratively connected with expansion comb tooth, and the side of expansion comb tooth is connected with fixed comb tooth, the end of fixed comb tooth is integratively connected with second mounting plate, expansion comb tooth and fixed comb tooth are interval arrangement, the top of tooth comb type expansion component is covered with protection component, protection component includes silica gel waterproof layer, and the top of silica gel waterproof layer is covered with first mounting plate, expansion comb tooth, fixed comb tooth, second mounting plate, the side of silica gel waterproof layer is provided with two groups of fixed vertical edges, and fixed vertical edge is fixedly connected to the bottom of silica gel waterproof layer, the bottom of fixed vertical edge is integratively connected with water guide groove, the top of silica gel waterproof layer is covered with steel wire protection net.

[0008] Preferably, the bottom of the fixed comb tooth is provided with a limit anti-warping component, the limit anti-warping component includes a bottom plate, and an opening is formed in the interior of the bottom plate, a limit guide column penetrates through the interior of the opening, and is fixedly connected with the bottom plate, a guide sliding cylinder is further nested on the exterior of the limit guide column, and is located in the interior of the opening, the guide sliding cylinder is in sliding connection with the limit guide column, and the top of the guide sliding cylinder is fixedly connected with the expansion comb tooth.

[0009] Preferably, the cross-sectional shape of the water guide groove is V-shaped, and the water guide groove is inclined.

[0010] Preferably, the side of the steel wire protection net penetrates through a fixed sleeve, and the fixed sleeve is fixedly connected with the steel wire protection net, the side of the fixed sleeve is fixedly connected with a fixed clamping block, and the shape of the fixed clamping block is L-shaped, a fourth fixed screw penetrates through the interior of the fixed sleeve, and is in threaded connection with the fixed sleeve.

[0011] Preferably, a buffer spring is further nested on the exterior of the limit guide column, one end of the buffer spring is fixedly connected with the bottom plate, and the other end of the buffer spring is fixedly connected with the guide sliding cylinder.

[0012] Preferably, the end of the fixed comb tooth penetrates through a second fixed screw, and the second fixed screw is in threaded connection with the fixed comb tooth, the fixed comb tooth further penetrates through the interior of the bottom plate, and the part of the bottom end of the fixed comb tooth protruding out of the bottom plate is in threaded connection on the bridge main body.

[0013] Preferably, the first mounting plate is provided with first fixing screws at the edges, the first fixing screws penetrate the first mounting plate, and the bottom part of the first fixing screws is screwed on the bridge body; the second mounting plate is provided with third fixing screws at the edges, the third fixing screws penetrate the second mounting plate, and the bottom part of the third fixing screws is screwed on the bridge body.

[0014] Compared with the prior art, the utility model has the beneficial effects as follows:

[0015] The comb tooth type bridge expansion joint provided by the utility model sets the waterproof layer at the top of the expansion joint, shields and protects the expansion joint, can directly block rainwater, snow water and other liquid pollutants from entering the expansion joint from above, and is particularly important for protecting the metal components inside the expansion joint; the waterproof layer at the top can greatly reduce the possibility of rust of the comb tooth plate, ensures normal work of the expansion joint, covers the top of the expansion joint, can also block impurities such as sand and gravel from being stuck in the expansion joint, does not need to be cleaned regularly, and does not affect normal sliding expansion of the expansion joint.

[0016] The comb tooth type bridge expansion joint provided by the utility model sets the waterproof layer at the top of the expansion joint, shields and protects the expansion joint, can directly block rainwater, snow water and other liquid pollutants from entering the expansion joint from above, and is particularly important for protecting the metal components inside the expansion joint; the waterproof layer at the top can greatly reduce the possibility of rust of the comb tooth plate, ensures normal work of the expansion joint, covers the top of the expansion joint, can also block impurities such as sand and gravel from being stuck in the expansion joint, does not need to be cleaned regularly, and does not affect normal sliding expansion of the expansion joint. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an overall explosion structure schematic view of the utility model;

[0018] Figure 2 It is a top view three-dimensional structure schematic view of the utility model;

[0019] Figure 3 It is a three-dimensional structure schematic view of the protection assembly part of the utility model;

[0020] Figure 4 It is a three-dimensional structure schematic view of the tooth comb type expansion assembly part of the utility model;

[0021] Figure 5 It is a three-dimensional structure schematic view of the limiting anti-warping assembly part of the utility model;

[0022] Figure 6 It is Figure 2 It is an enlarged structure schematic view of position A in the utility model.

[0023] In the figure: 1, tooth comb type telescopic assembly; 2, protection assembly; 3, limit anti-warping assembly; 101, first mounting plate; 102, telescopic comb tooth; 103, fixed comb tooth; 104, second mounting plate; 105, first fixed screw; 106, second fixed screw; 107, third fixed screw; 201, silica gel waterproof layer; 202, fixed vertical edge; 203, water guide groove; 204, steel wire protection net; 205, fixed sleeve; 206, fixed clamping block; 207, fourth fixed screw; 301, bottom plate; 302, opening; 303, limit guide column; 304, buffer spring; 305, guide sliding cylinder. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] In order to further understand the content of the utility model, the utility model will be described in detail in combination with the drawings. EMBODIMENT

[0026] Please refer to Figures 1 to 6 The utility model discloses a tooth comb type bridge expansion joint, which comprises a tooth comb type telescopic assembly 1, the tooth comb type telescopic assembly 1 comprises a first mounting plate 101, the side of the first mounting plate 101 is integrally connected with a telescopic comb tooth 102, the side of the telescopic comb tooth 102 is slidably connected with a fixed comb tooth 103, the end of the fixed comb tooth 103 is integrally connected with a second mounting plate 104, the telescopic comb tooth 102 and the fixed comb tooth 103 are arranged at intervals, the end of the fixed comb tooth 103 penetrates a second fixed screw 106, and the second fixed screw 106 is threadedly connected with the fixed comb tooth 103, the fixed comb tooth 103 also penetrates the inside of a bottom plate 301, and the part of the bottom end of the fixed comb tooth 103 extending out of the bottom plate 301 is threadedly connected on a bridge main body, the side of the first mounting plate 101 is provided with first fixed screws 105 at equal intervals, the first fixed screws 105 penetrate the first mounting plate 101, and the part of the bottom of the first fixed screws 105 extending out of the first mounting plate 101 is threadedly connected on the bridge main body, the side of the second mounting plate 104 is provided with third fixed screws 107 at equal intervals, the third fixed screws 107 penetrate the second mounting plate 104, and the part of the bottom of the third fixed screws 107 extending out of the second mounting plate 104 is threadedly connected on the bridge main body.

[0027] The first mounting plate 101 and the second mounting plate 104 are fixed to the two beams of the bridge by the first fixing screw 105 and the third fixing screw 107, respectively, with their top surfaces slightly lower than the top surface of the bridge. When the bridge on both sides expands or contracts due to temperature, the telescopic comb teeth 102 can slide in the gap of the fixed comb teeth 103 to adapt to the expansion and contraction deformation of the bridge body.

[0028] The top of the comb-type telescopic component 1 is covered with a protective component 2, which includes a silicone waterproof layer 201. The silicone waterproof layer 201 covers the top of the first mounting plate 101, the telescopic comb teeth 102, the fixed comb teeth 103, and the second mounting plate 104. Two sets of fixed vertical edges 202 are symmetrically arranged on the sides of the silicone waterproof layer 201, and the fixed vertical edges 202 are fixedly connected to the bottom of the silicone waterproof layer 201. A water guide channel 203 is integrally connected to the bottom edge of the fixed vertical edges 202. The top of the silicone waterproof layer 201 is covered with a steel wire protective net 204. The cross-sectional shape of the water guide channel 203 is set in a V-shape, and the water guide channel 203 is inclined. Water in the gap where the water guide channel 203 contacts the bridge can flow down along the fixed vertical edges 202 into the interior of the water guide channel 203. At the same time, the inclined water guide channel 203 can guide water to both sides of the bridge, preventing water from flowing down the telescopic comb teeth 103. When a contraction joint intrudes into the bridge, a fixing sleeve 205 penetrates the side of the wire mesh protective net 204, and the fixing sleeve 205 is fixedly connected to the wire mesh protective net 204. A fixing block 206 is fixedly connected to the side of the fixing sleeve 205, and the fixing block 206 is L-shaped. A fourth fixing screw 207 penetrates the inside of the fixing sleeve 205, and the fourth fixing screw 207 is threadedly connected to the fixing sleeve 205. The fixing sleeve 205, fixing block 206, and fourth fixing screw 207 are used to fix the wire mesh protective net 204 to the bridge. After fixing, the top surface of the wire mesh protective net 204 is flush with the top surface of the bridge. At the same time, the wire mesh protective net 204 covers the silicone waterproof layer 201, which can protect the silicone waterproof layer 201, reduce the wear of the silicone waterproof layer 201 by passing vehicles, and increase the service life of the silicone waterproof layer 201.

[0029] On the bridge at the outer positions of the first mounting plate 101 and the second mounting plate 104, two grooves are reserved for fixing the fixed vertical edge 202 to the bridge. After being inserted, the gap can be sealed with concrete, and the fixed vertical edge 202 is fixed at the same time. The silicone waterproof layer 201 covers the top of the toothed expansion assembly 1 to shield and protect the toothed expansion assembly 1, preventing rainwater or sand from entering the tooth gap. This can effectively prevent the internal components of the toothed expansion assembly 1 from being corroded and prevent sand from clogging the tooth gap, thereby ensuring that the bridge can expand and contract normally.

[0030] The bottom of the fixed comb teeth 103 is provided with a limiting anti-tilting component 3. The limiting anti-tilting component 3 includes a base plate 301, and the base plate 301 has an opening 302 inside. The opening 302 passes through the limiting guide post 303 and is fixedly connected to the base plate 301. The limiting guide post 303 is also nested outside the limiting guide post 303, and the guiding slide 305 is located inside the opening 302. The guiding slide 305 is slidably connected to the limiting guide post 303, and the top of the guiding slide 305 is fixedly connected to the telescopic comb teeth 102. The limiting guide post 303 is also nested outside the limiting guide post 303. One end of the buffer spring 304 is fixedly connected to the base plate 301, and the other end of the buffer spring 304 is fixedly connected to the guiding slide 305.

[0031] The guide slide 305 interacts with the limiting guide post 303 to limit the end of the telescopic comb 102, so that it can only move horizontally and will not tilt upward, thereby preventing it from affecting passing vehicles. In addition, a buffer spring 304 is provided. The buffer spring 304 uses its own elastic potential energy to weaken and buffer the instantaneous impact force on the expansion joint, thereby improving the service life of the expansion joint.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A comb-shaped bridge expansion joint, characterized in that: The device includes a comb-type telescopic assembly (1), which includes a first mounting plate (101). Telescopic comb teeth (102) are integrally connected to the side of the first mounting plate (101), and fixed comb teeth (103) are slidably connected to the side of the telescopic comb teeth (102). A second mounting plate (104) is integrally connected to the end of the fixed comb teeth (103). The telescopic comb teeth (102) and the fixed comb teeth (103) are spaced apart. A protective assembly (2) covers the top of the comb-type telescopic assembly (1). The system includes a silicone waterproof layer (201), which covers the top of the first mounting plate (101), telescopic comb teeth (102), fixed comb teeth (103), and the second mounting plate (104). The silicone waterproof layer (201) has two sets of fixed vertical sides (202) symmetrically arranged on its sides, and the fixed vertical sides (202) are fixedly connected to the bottom of the silicone waterproof layer (201). The bottom edge of the fixed vertical side (202) is integrally connected to a water guide groove (203), and the top of the silicone waterproof layer (201) is covered with a steel wire protective net (204). The bottom of the fixed comb teeth (103) is provided with a limiting anti-tilting component (3). The limiting anti-tilting component (3) includes a base plate (301) and an opening (302) is provided inside the base plate (301). A limiting guide post (303) passes through the opening (302) and is fixedly connected to the base plate (301). A guide cylinder (305) is also nested outside the limiting guide post (303) and is located inside the opening (302). The guide cylinder (305) is slidably connected to the limiting guide post (303), and the top of the guide cylinder (305) is fixedly connected to the telescopic comb teeth (102).

2. The comb-type bridge expansion joint according to claim 1, characterized in that: The cross-sectional shape of the water guide channel (203) is set as V-shaped, and the water guide channel (203) is inclined.

3. The comb-type bridge expansion joint according to claim 1, characterized in that: A fixing sleeve (205) is inserted through the side of the steel wire protective net (204), and the fixing sleeve (205) is fixedly connected to the steel wire protective net (204). A fixing block (206) is fixedly connected to the side of the fixing sleeve (205), and the fixing block (206) is L-shaped. A fourth fixing screw (207) is inserted through the inside of the fixing sleeve (205), and the fourth fixing screw (207) is threadedly connected to the fixing sleeve (205).

4. A comb-type bridge expansion joint according to claim 1, characterized in that: The limiting guide post (303) is also nested with a buffer spring (304). One end of the buffer spring (304) is fixedly connected to the base plate (301), and the other end of the buffer spring (304) is fixedly connected to the guide slide (305).

5. A comb-type bridge expansion joint according to claim 1, characterized in that: The end of the fixed comb tooth (103) is penetrated by a second fixing screw (106), and the second fixing screw (106) and the fixed comb tooth (103) are threadedly connected. The fixed comb tooth (103) also penetrates the interior of the base plate (301), and the part of its bottom end that extends out of the base plate (301) is threadedly connected to the bridge body.

6. A comb-type bridge expansion joint according to claim 1, characterized in that: The first mounting plate (101) is provided with first fixing screws (105) at equal intervals on its side, and the first fixing screws (105) penetrate the first mounting plate (101), and the part of its bottom extending out of the first mounting plate (101) is threadedly connected to the bridge body. The second mounting plate (104) is provided with third fixing screws (107) at equal intervals on its side, and the third fixing screws (107) penetrate the second mounting plate (104), and the part of its bottom extending out of the second mounting plate (104) is threadedly connected to the bridge body.

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